Study of the UTMD-based delivery system to induce cervical cancer cell apoptosis and inhibit proliferation with shRNA targeting Survivin

Int J Mol Sci. 2013 Jan 16;14(1):1763-77. doi: 10.3390/ijms14011763.

Abstract

Apoptosis induction by short hairpin RNA (shRNA) expression vectors could be an efficient and promising strategy for cancer gene therapy. Ultrasound-targeted microbubble destruction (UTMD) is an appealing technique. In this study, we investigated the apoptosis induction and suppression of cell proliferation in vivo transfected by the UTMD-based shRNA delivery system. Nude mice with transplanted tumors of cervical cancer were randomly arranged into three groups: control group, plasmid injection and ultrasound (P + US), P + UTMD group. Expressions of Survivin and proliferating cell nuclear antigen (PCNA), Bcl-2, Bax, Caspase-3, Ki-67, nucleostemin (NS) were investigated by immunohistochemistry. Furthermore, microvessel density (MVD) was detected by CD34 protein expressions and apoptotic index (AI) was measured by TUNEL. As compared with those in the control and P + US groups, protein expressions of PCNA, Ki-67, Bcl-2, Survivin and NS in P + UTMD groups were down-regulated markedly, while those of Bax, Caspase-3 were up-regulated significantly (p < 0.05). MVD decreased significantly, whereas AI increased remarkably (p < 0.05). We suggested that UTMD-based shRNA delivery system could induce apoptosis and inhibit proliferation significantly, without causing any apparently adverse effect, representing a new, promising technology that would be used in the future gene therapy and research.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis / genetics*
  • Blood Vessels / metabolism
  • Caspase 3 / metabolism
  • Cell Proliferation / genetics*
  • Female
  • Gene Transfer Techniques*
  • HeLa Cells
  • Humans
  • Immunohistochemistry
  • Inhibitor of Apoptosis Proteins / genetics*
  • Inhibitor of Apoptosis Proteins / metabolism
  • Ki-67 Antigen / metabolism
  • Mice
  • Mice, Inbred BALB C
  • Mice, Nude
  • Microbubbles
  • Proliferating Cell Nuclear Antigen / metabolism
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • RNA Interference
  • RNA, Small Interfering / administration & dosage
  • RNA, Small Interfering / genetics*
  • Random Allocation
  • Survivin
  • Tumor Burden / genetics
  • Ultrasonics
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / pathology
  • Uterine Cervical Neoplasms / therapy
  • Xenograft Model Antitumor Assays

Substances

  • BIRC5 protein, human
  • Inhibitor of Apoptosis Proteins
  • Ki-67 Antigen
  • Proliferating Cell Nuclear Antigen
  • Proto-Oncogene Proteins c-bcl-2
  • RNA, Small Interfering
  • Survivin
  • Caspase 3